CC2642R: 在固件代码中如何增加监测外部32.768K晶体是否正常工作的代码？

添加以下代码将32Kcrystal映射到某个IO口进行测量：

Map the 32-kHz System Clock (LF Clock) to DIO

The AON IOC contains the output enable control for the 32-kHz LF system clock output, and the clock signal has its own PORTID called AON_CLK32K (0x7). This makes it easy to output the clock signal to a pin. Map the clock to a chosen DIO, and enable the clock output by setting the
AON_IOC:CLK32KCTL.OE_N register field to 0x0. The following two driver library calls achieve the same result:

#include <driverlib/aon_ioc.h>
IOCPortConfigureSet(IOIDn, IOC_PORT_AON_CLK32K, IOC_STD_OUTPUT);
AONIOC32kHzOutputEnable();